China
Yunnan. Copper 50 Cash ND (1919) MS61 Brown NGC, KM-Y478a, CCC-579, Duan-2771. Obv. 3/4 facing bust of General Tang Chi-yao. Rev. Crossed flags. Well struck, with pleasing reddish-brown patina, and a few tiny marks. The copper striking is considerably scarcer than the brass strike and Mint State examples are rare.
Estimate: 3000-4000 USD